Generally, you can calculate it with this formula: df = (r-1)(c-1) where r is the number of rows and c is the number of columns.
Answer:
The answer is A ovaries and uterus
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Geologic Time Scale
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it's the sun
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the water cycle is driven primarily by the energy from the sun
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Scientist count the world humans population with an organization called The United Nations Population Division (UNPD),
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Which keeps track of the world population, projects that the world's human population will hit 7 billion on Halloween Day 2011. Admittedly, that is just an estimate: There's no way to know exactly how many people are alive at any given moment, and the true date that humanity's ranks will surpass 7 billion could come in the weeks or months before or after Oct. 31. Nonetheless, the UN's guess is the best there is.
